Credit Card Minimums Top Out at $10, and Debit Cards Get None

A sign by the register that says "$10 minimum for cards" is one of the oldest ways a small business fights per-transaction fees. It is also one of the easiest card rules to get wrong. Federal law does let a US business set a minimum purchase for card payments, but only up to $10, only on credit cards, and only if the minimum is the same for every card brand. A minimum applied to a debit card breaks the card network rules, even when the debit card is run as credit.

This post walks through what the law says, how Visa, Mastercard and American Express write the rule into their own rulebooks, who is allowed to set a maximum instead, and how to run a minimum that will not draw a complaint. It covers card acceptance in the United States.

Why small card sales cost so much

Most pricing plans combine a percentage of the sale with a fixed fee per transaction, and on a small ticket that fixed fee does most of the damage. As an illustration only, take a rate of 2.9% plus 30 cents, which is not any particular provider's quote. On a $20 sale that comes to 88 cents, about 4.4% of the ticket. On a $4 coffee it comes to about 42 cents, more than 10% of the sale. A business that sells a lot of low-priced items feels that difference every day, and that is where the minimum comes from.

What federal law allows

The card networks' rules start from a ban on minimum and maximum transaction amounts. The Dodd-Frank Act of 2010 carved out the US exception. Section 1075, the part usually called the Durbin Amendment, added a section to the Electronic Fund Transfer Act that is now codified at 15 U.S.C. 1693o-2. Subsection (b)(3) says a payment card network may not, by contract, penalty or otherwise, stop a business from setting a minimum dollar value for accepting credit cards, as long as two conditions are met:

• The minimum does not differentiate between issuers or between payment card networks.
• The minimum does not exceed $10.00.

The statute lets the Federal Reserve raise the $10 figure by regulation. As of November 2026 the networks' own rules still state the cap as USD 10: Visa's rules effective 24 October 2026 and the 2 June 2026 Mastercard Rules both use that figure.

Two details are easy to miss. First, the law protects your right to set a minimum against the networks. It does not require you to have one. Second, the protection applies to credit cards only. Nothing in the statute lets a merchant set a minimum on debit cards.

Debit cards cannot carry a minimum

The same statute defines a debit card broadly: any card or other payment code or device used to debit an asset account, whether the transaction is authorized by signature, PIN or other means, including a general-use prepaid card. Running a debit card "as credit" with a signature does not turn it into a credit card. Neither does the customer pressing the credit button on the terminal. If the card draws on a checking account or a prepaid balance, it is debit, and the network rules require you to take it for any amount.

A debit cardholder who objects to a minimum is right to. A sign that reads "$10 minimum for cards" gets this wrong, because it covers debit as well as credit.

How Visa and Mastercard write the rule

Both networks start from a general ban and then carve out the US exception the statute requires.

Visa

Visa's Core Rules (section 1.5.5.1) say a merchant must not establish a minimum or maximum transaction amount as a condition for honoring a card. The US exception sits in section 5.4.2.4 of the Visa Product and Service Rules: in the US Region or a US Territory, a merchant may set a minimum only for a transaction made with a credit card issued in the US Region or a US Territory. The minimum must not be greater than USD 10 and must not discriminate between issuers or between Visa and another payment network.

Note the words "issued in the US Region or a US Territory". Under Visa's text, a credit card issued abroad, such as one carried by a tourist, is not covered by the exception, so the general ban applies to it.

Mastercard

The Mastercard Rules (2 June 2026 edition, rule 5.12.3) say a merchant must not require, or indicate that it requires, a minimum or maximum transaction amount to accept a valid and properly presented Mastercard or Maestro card. The US and US Territories modification lets a merchant set a minimum for a Mastercard card that provides access to a credit account, provided the minimum does not differentiate between issuers, does not differentiate between Mastercard and another acceptance brand, and does not exceed USD 10 or any higher amount the Federal Reserve sets by regulation.

Mastercard's US text does not mention where the card was issued, as Visa's does. Because the minimum also has to be the same for every brand, the simplest policy that satisfies both is to apply it to US-issued credit cards only.

American Express

The American Express Merchant Rules (October 2026) have no stand-alone minimum clause. In the US, section 3.2 does prohibit imposing any restrictions, conditions, disadvantages or fees on the Card that are not imposed equally on all other payment products, except for electronic funds transfer, cash and check. In practice, a minimum on Amex has to match the minimum on the other credit cards you take, and the federal protection for minimums covers only credit cards and only amounts of $10 or less.

Maximums are reserved for government and schools

The statute lets only two kinds of entity set a maximum amount for credit cards: federal agencies and institutions of higher education. The network rules follow it. Visa allows a maximum on US-issued credit cards only for US federal government agencies and for merchants assigned MCC 8220 (colleges, universities, professional schools and junior colleges), 8244 (business and secretarial schools) or 8249 (trade and vocational schools). Mastercard's list is a department, agency or instrumentality of the US government, a corporation it owns or controls, and merchants whose primary business falls under the same three school MCCs. In every case the maximum must not differentiate between issuers or between networks.

A retailer cannot post "cards accepted up to $2,000" to manage its exposure on large tickets. That is different from a limit your acquirer sets on your account, such as a maximum ticket size, a monthly volume cap or a hold on unusually large sales. Those are risk controls in your merchant agreement, not conditions you put on the cardholder. If yours is too low for your sales, the right response is to talk to your processor about raising them, not to turn customers away at the register.

Running a minimum without breaking the rules

If a minimum makes sense for your business, run it like this:

1. Apply it to credit cards only. Debit and prepaid cards, whether they are run with a PIN or a signature, are accepted for any amount.
2. Keep it at $10 or less. A $5 minimum is allowed. A $15 minimum is not.
3. Apply the same minimum to every brand. A $10 minimum on Visa and Mastercard with no minimum on American Express, or the other way round, differentiates between networks.
4. Apply it to US-issued credit cards only. Visa's exception covers only cards issued in the US Region or a US Territory, and a single rule for all US-issued credit cards keeps the brands treated alike.
5. Word the sign accurately. "$10 minimum on credit card purchases" is accurate. "$10 minimum for cards" is not.
6. Check whether your terminal or POS can identify the card type and apply the minimum automatically, so cashiers are not judging from the plastic.
7. Train staff to accept a debit card, or a credit card from a foreign issuer, for a small sale without argument.

Online, the rule text is about a minimum set as a condition of honoring a card. A minimum order value that applies whatever the customer pays with is a pricing decision rather than a card-acceptance condition. A checkout that blocks card payments below an amount while taking other payment methods is a card minimum, and the rules above apply to it. If you are not sure which side of the line your checkout falls on, ask your acquirer before you build it.

What happens when a minimum breaks the rules

The card networks do not deal with merchants directly. They reach you through your acquirer. Visa's rules require every merchant agreement to include language obliging the merchant to comply with the Visa Rules on acceptance, and to give Visa the right to limit or terminate the merchant's agreement. A customer who complains about a debit card minimum is complaining about a breach of rules that your own contract says you will follow.

How a breach is handled depends on your acquirer and your agreement. A business already under extra scrutiny, because of its industry, its dispute ratio or a reserve, should not hand its acquirer an easy compliance problem on top. An inaccurate sign is the easiest one to fix.

Other ways to deal with small-ticket costs

A minimum is not the only tool, and for many businesses it is not the best one. Customers who are turned away over a $10 minimum often do not come back.

• Offer a cash discount. The same section of federal law that allows minimums stops the networks from preventing discounts for paying with cash, checks, debit cards or credit cards, provided the discount does not differentiate by issuer or network and is disclosed as federal and state law require.
• Look at a credit card surcharge with care. Surcharging is allowed in many states but comes with its own network registration, disclosure and cap rules, and some state laws restrict it. Our guides on Visa's convenience fee rules and on state junk fee laws cover the details.
• Review your pricing structure. If most of your sales are small, the per-transaction fee matters more than the percentage. Ask your processor to show you the cost of your actual average ticket under each pricing model it offers.

If you have a merchant account that is costing you more on small tickets than it should, or you are not sure your acceptance policy matches your processor's rules, PayKings can review your statement and your setup with you.